Wyoming tornadoes

Are tornadoes common in Wyoming?

Wyoming averages about 9.2 tornadoes a year since 2000, 28th of 52 states and territories by count. The busiest year on record was 1979 (42). Per 10,000 square miles of land, Wyoming records 77 tornadoes since 1950, 37th of 51 states and territories by that measure.

1. 1. Florida 701
2. 2. Oklahoma 658
3. 3. Mississippi 614
4. 4. Louisiana 579
5. 5. Illinois 567
6. 6. Kansas 564
7. 7. Iowa 555
8. 8. Alabama 537
9. 9. Indiana 492
10. 10. Maryland 438
11. 37. Wyoming 77

Source: NOAA SPC, tornadoes 1950-2025, per 10,000 square miles of land area (Census Bureau 2024 Gazetteer; places under 1,000 square miles not ranked). Damage colours: Storm Events damage, 2025 dollars.

Which counties in Wyoming have the most tornadoes?

Per square mile, Laramie County leads Wyoming: 85 days with a tornado record since 1950, 31.6 per 1,000 square miles of land. By raw count, Laramie County has the most tornado records (130 since 1950); large counties collect more records simply by covering more ground, so the ranking counts days with a record per unit of area (a storm filed for several forecast zones adds several records but one day).

1. Laramie County 31.6 (130)
2. Goshen County 31.0 (92)
3. Platte County 20.7 (50)
4. Campbell County 13.3 (93)
5. Niobrara County 11.4 (36)
6. Crook County 10.9 (38)
7. Weston County 10.4 (28)
8. Big Horn County 8.3 (33)
9. Natrona County 6.9 (40)
10. Converse County 6.8 (47)
11. Albany County 6.6 (32)
12. Johnson County 4.8 (23)

Source: NOAA NCEI Storm Events Database, days with a record in the county since 1950 per 1,000 square miles of land (Census Bureau 2024 Gazetteer); in brackets, the count of records.

When is tornado season in Wyoming?

65% of its tornadoes since 1950 fell in May and June. The busiest month is June (323 tornadoes).

Source: NOAA Storm Prediction Center tornado database, state segments by the month they began, 1950-2025.

What were the deadliest tornadoes in Wyoming?

Source: NOAA Storm Prediction Center tornado database (state segments: deaths and path inside Wyoming), 1950-2025; counties are the first four the SPC lists for the segment. SPC severe weather database.

Where have the strongest tornadoes tracked in Wyoming?

Source: NOAA Storm Prediction Center tornado database, 1950-2025, start and end points of each track; county lines: Census Bureau cartographic boundaries (2017), via us-atlas. SPC severe weather database. Census cartographic boundary files.

The strongest tornadoes in Wyoming

Source: NOAA Storm Prediction Center tornado database; F scale before February 1, 2007, EF scale after.

The longest tornado paths in Wyoming

Source: NOAA Storm Prediction Center tornado database, state segments: path length and width inside the state. SPC severe weather database.

Tornadoes in every Wyoming county

Source: NOAA Storm Prediction Center tornado database: whole tornadoes whose track touched the county (any state segment listing it). SPC severe weather database.

The costliest tornadoes in Wyoming

Before 1993 NOAA filed damage by category, not amount, so the list above starts in 1993. The highest category filed here before then (entered as $25M, in the dollars of the day) holds: July 16, 1979 (tornado, Laramie County, 1 killed).

Source: NOAA NCEI Storm Events Database: property and crop damage as estimated by the National Weather Service, in 2025 dollars.

Are tornadoes becoming more frequent in Wyoming?

Wyoming's count per decade against the whole country's, and its share. The Storm Prediction Center notes that tornado reports rose especially around the installation of the NEXRAD Doppler radar network in the mid-1990s, so a rising count is partly better detection; the share of the national total is the fairer comparison across decades.

Source: NOAA Storm Prediction Center tornado database, state segments.

The most recent tornadoes in Wyoming

Source: NOAA NCEI Storm Events Database, records through June 30, 2026; the newest months are revised by NCEI as reports arrive. Search the record at NCEI.

Federal disaster declarations for tornadoes in Wyoming

FEMA has declared 2 disasters in Wyoming for tornadoes, counting its incident type and declarations that name tornado in the title (FEMA files most storm disasters under Severe Storm); 2 were major disasters, the latest on August 22, 2005.

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), through October 2, 2026. OpenFEMA dataset page.

Next

• Laramie County: the county's whole recordThe Wyoming county with the most tornadoes per square mile
• Tornadoes across the United StatesEvery state ranked, by year and month
• Every natural hazard in WyomingTornadoes, floods, storms, heat and the federal declarations
• High wind and dust storms in Wyoming8,737 records
• Winter storms in Wyoming7,057 records
• Hail in Wyoming4,924 records